mingw - cdecl required to run functions correctly

The code below is running correctly with any online gcc compiler I found (gcc 9.2.0), it also run correctly with CYGWIN gcc compiler, but unfortunately it doesn't work well with MINGW gcc compiler - looks like it passes invalid parameter as "this" to "methodA" and "methodB" methods, when they are called, instead of expected results (56,58) i get some random high numbers.

#include <iostream>using namespace std;class CallbackBase{    public:    using METHOD_TYPE = int  (CallbackBase::*)(...);};  class CallbackProvider : public CallbackBase{public:    int methodA(int a,int b,int c)    {        return a+b+c+d;    }    int methodB(double a,double b,double c)    {       return a+b+c+d;    }    private:    int d=8;};class CallbackRunner{public:               CallbackBase::METHOD_TYPE m_method;               CallbackBase* m_this;               void install (CallbackBase* _this, CallbackBase::METHOD_TYPE _method)               {                              m_method =_method;                              m_this =_this;               }               int Run1()               {                   return (m_this->*m_method)(15L,16L,17L);               }               int Run2()               {                   return (m_this->*m_method)(15.6,16.7,17.8);               }};int main(){    CallbackProvider    cp;    CallbackRunner      cr;    cr.install(&cp,(CallbackBase::METHOD_TYPE)&CallbackProvider::methodA);    cout << "result "<< cr.Run1() << endl;    cr.install(&cp,(CallbackBase::METHOD_TYPE)&CallbackProvider::methodB);    cout << "result "<< cr.Run2() << endl;               return 0;}

The problem is solved if I add __cdecl attribute to this methods:

int __cdecl methodA(int a,int b,int c)int __cdecl methodB(double a,double b,double c) 

I doesn't use -mrtdcompilation flag.According to this, __cdecl should be a default calling convention for gcc compilers but looks like it doesn't the case for MINGW.

Is that possible to set __cdecl as a default calling convention for my project?or as alternative, is there a way to set "default" attribute to all the methods?

I am using Windows 10 with 64 bit architecture.